| A | B |
|---|
| Weight | The measurement of the force of gravity on the mass of an object. |
| Newton’s 2nd Law of Motion | States the relationship between force, mass and acceleration (F=ma). |
| Electromagnetic force | Results from the basic properties of particles; the positive to negative attraction. |
| Air resistance | The force that air exerts on all moving objects. |
| Weak nuclear force | Involved in the radioactive decay of some unstable nuclei. |
| Force | A push or pull that one object exerts on another object. |
| Gravitational force | An attractive force that exists between all objects dependent on mass and distance between objects. |
| Strong nuclear force | Holds the particles in the nucleus together. |
| Balanced forces | Forces that are equal in size and opposite in direction that do not cause an object to accelerate. |
| Newton’s 1st Law of Motion | An object at rest remains at rest and a moving object keeps moving at the same speed and in the same direction unless acted upon by a net force. |
| Momentum | Refers to the strength or power in the movement of an object. |
| Gravity | The force that attracts everything to the center of the Earth. |
| Newton’s 3rd Law of Motion | For every action there is an equal and opposite reaction. |
| Inertia | The tendency of an object to resist any change in its motion. |
| Unbalanced forces | Forces that are not equal in size or opposite in direction that always causes an object to accelerate. |
| Friction | A force that opposes motion between two surfaces that are in contact. |
